Suprimento de potássio em função da adubação potássica residual em um Latossolo Vermelho do Cerrado

Rosolem, Ciro Antônio; Vicentini, João Paulo Testa Moura Montans; Steiner, Fábio

doi:10.1590/s0100-06832012000500015

Cited by 28 publications

(49 citation statements)

References 24 publications

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“…Rosolem et al (2012), when working with the addition of potassium in Oxisol, observed an increase in the dry mass of roots of Braquiaria (B. ruziziensis), with maximum production obtained in a potassium dose of 300 mg dm An increase in dry matter production, promoted by nitrogen fertilization, was also reported by Araújo et al (2005), who evaluated the response of wheat (cv. IAC-24) to nitrogen via green manure and mineral fertilizer (urea).…”

Section: Discussionmentioning

confidence: 61%

Nitrogen and Potassium in Production, Nutrition and Water Use Efficiency in Wheat Plants

et al. 2016

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is a cereal used in food and feed for its nutritional properties. For nitrogen and potassium management, efficient use of water is required for greater availability and transportation of these nutrients. The objective of this study was to evaluate the effect of combinations of nitrogen and potassium doses in production, nutrition and water use efficiency in wheat. The experiment was held in a greenhouse with 8-dm 3 pots using Oxisol collected at a depth of 0-0.2 m under Cerrado vegetation. Base saturation was raised to 60%. The experimental design was a randomized block in a 5x5 factorial arrangement with five doses of nitrogen (0, 100, 200, 300 and 400 mg dm -3 ) and potassium (0, 90, 180, 270, 360 mg dm -3 ) with four replications. Soil moisture was maintained by an auto-irrigation system (3 kPa pressure). The experiment was collected at 95 days after plant emergence. We evaluated the dry mass of ears, shoots and roots, the total dry matter, nitrogen and potassium in grains, and the consumption and efficiency in water use. An analysis of variance and regression test at 5% probability was conducted using SAS statistical software (SAS Institute, Inc., Cary, North Carolina). The nitrogen and potassium alone increased the dry mass of ears by 31.47% and 20.91%, respectively. There was an interaction of nutrients on the dry mass of the shoots and the total dry matter. Potassium increases the concentration of nitrogen. Nitrogen and potassium promote gains in production, nutrition and water use efficiency.

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Section: Discussionmentioning

confidence: 61%

Nitrogen and Potassium in Production, Nutrition and Water Use Efficiency in Wheat Plants

et al. 2016

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“…Soil acidification and nutrient depletions were the result of long-term (>30 yr) soil use with continuous grazing and the absence of lime and fertilizer inputs, as indicated by Cherubin et al (2015) (Kayser and Isselstein, 2005), and release of non-exchangeable K forms by the aggressive root systems of the grasses (Rosolem et al, 2012).…”

Section: Soil Chemical Indicatorsmentioning

confidence: 99%

A Soil Management Assessment Framework (SMAF) Evaluation of Brazilian Sugarcane Expansion on Soil Quality

Cherubin

Karlen

Franco

et al. 2016

Soil Science Soc of Amer J

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The Soil Management Assessment Framework (SMAF) was developed to evaluate impacts of land use and management practices on soil quality (SQ), but its suitability for Brazilian tropical soils was unknown. We hypothesized that SMAF would be sensitive enough to detect SQ changes associated with sugarcane (Saccharum officinarum L.) expansion for ethanol production. Field studies were performed at three sites across the south-central region of Brazil, aiming to quantify the impacts of a land use change sequence (i.e., native vegetation-pasture-sugarcane) on SQ. Eight soil indicators were individually scored using SMAF curves developed primarily for North American soils and integrated into an overall Soil Quality Index (SQI) and its chemical, physical, and biological sectors. The SMAF scores were correlated with two other approaches used to assess SQ changes, soil organic C (SoC) stocks and Visual Evaluation of Soil Structure (VESS) scores. our findings showed that the SMAF was an efficient tool for assessing land use change effects on the SQ of Brazilian tropical soils. The SMAF scoring curves developed using robust algorithms allowed proper assignment of scores for the soil chemical, physical, and biological indicators assessed. The SQI scores were significantly correlated with SoC stocks and VESS scores. Long-term transition from native vegetation to extensive pasture promoted significant decreases in soil chemical, physical, and biological indicators. overall SQI suggested that soils under native vegetation were functioning at 87% of their potential capacity, while pasture soils were functioning at 70%. Conversions of pasture to sugarcane induced slight improvements in SQ, primarily because of improved soil fertility. Sugarcane soils are functioning at 74% of their potential capacity. Based on this study, management strategies were developed to improve SQ and the sustainability of sugarcane production in Brazil.Abbreviations: AGS, macroaggregate stability; BD, bulk density; BG, b-glucosidase activity; MBC, microbial biomass carbon; SMAF, Soil Management Assessment Framework; SQ, soil quality; SQI, soil quality index; SOC, soil organic carbon; VESS, Visual Evaluation of Soil Structure. S oil quality or health is a key factor required to achieve sustainable agricultural systems that will meet our increasing demands for food, feed, fiber, and fuels. Therefore, in recent decades SQ has been discussed worldwide and become a major agenda item for the scientific community (Karlen et al., , 2014a. Soil quality was defined as the capacity of a specific kind of soil to function, within natural or managed ecosystem boundaries, to sustain plant and animal productivity, maintain or enhance water and air quality, and support human health and habitation (Karlen et al., 1997 Core Ideas:• The SMAF efficiently detected soil quality changes under Brazilian tropical conditions.• Soil Quality Index was 0.87 (native vegetation), 0.70 (pasture), and 0.74 (sugarcane).• Sugarcane expansion improves soil quality, mainly due to increasing so...

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“…In their work on lettuce cultivation, Araújo et al (2010) reported a linear reduction in the efficiency of water use with increased irrigation. Rosolem et al (2012) reported a rise in the shoot dry mass of Brachiaria ruziziensis, at 150 to 300 mg dm -3 doses, while contribution of potassium fertilizer towards the production of the shoot dry mass was analyzed. An increased MDS value was identified as a function of potassium fertilization, as also observed by Coutinho et al (2014).…”

Section: Water Use Of Efficiencymentioning

confidence: 99%

Productive characteristics of quinoa (Chenopodium quinoa Willd.) under irrigation and potassium fertilization

Rêgo¹,

Koetz²,

Bonfim-Silva³

et al. 2017

Aust J Crop Sci

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Quinoa (Chenopodium quinoa Willd.) quickly adapts to different climatic conditions; however, low soil fertility conditions and inadequate soil water levels may reduce yield. The objective of this study was to evaluate the effect of irrigation levels and potassium fertilization for quinoa production in the Cerrado Oxisol. The experiment was performed in a greenhouse, located at the Federal University of Mato Grosso (UFMT), Campus of Rondonópolis -Brazil, using soil collected from a Cerrado Oxisol. The experimental design was a randomized complete block design in a 5x5 factorial scheme with four replicates, corresponding to five potassium doses (0, 100, 200, 400 and 600 mg dm -3 ) and five irrigation levels (50, 75, 100, 125 and 150% of field capacity). The variables of dry mass of shoot, dry mass of roots, water use efficiency, mass of 100 grains, production and number of grains were analyzed. The dry mass of the aerial part and the roots are influenced by the potassium fertilization in the doses between 530 and 600 mg dm -3 . All the vegetative and productive characteristics were affected by the treatments. The highest water use efficiency was observed at the potassium (K 2 O) dose of 375 mg dm -3 and a 50% irrigation level.

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Suprimento de potássio em função da adubação potássica residual em um Latossolo Vermelho do Cerrado

Abstract: RESUMO

Cited by 28 publications

References 24 publications

Nitrogen and Potassium in Production, Nutrition and Water Use Efficiency in Wheat Plants

Nitrogen and Potassium in Production, Nutrition and Water Use Efficiency in Wheat Plants

A Soil Management Assessment Framework (SMAF) Evaluation of Brazilian Sugarcane Expansion on Soil Quality

Productive characteristics of quinoa (Chenopodium quinoa Willd.) under irrigation and potassium fertilization

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